Facility Lease - Lease cost (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Operating lease cost
Operating lease costs	$ 306	$ 261	$ 746	$ 740
Costs of non-lease components (previously common area maintenance)	108	98	241	298
Total operating lease cost	414	359	987	1,038
Other Information
Operating cash flows used for operating lease	$ 433	$ 413	$ 1,265	$ 1,240
Remaining lease term	2 years 3 months 18 days	3 years 3 months 18 days	2 years 3 months 18 days	3 years 3 months 18 days
Discount rate	8.00%	8.00%	8.00%	8.00%

Amount of lease cost recognized by lessee for lease contract.

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-Publisher FASB
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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

+ References

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.

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